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KCSAN: data-race in __mark_inode_dirty / redirty_tail_locked (7)

Status: moderation: reported on 2024/06/10 04:44
Subsystems: ext4
[Documentation on labels]
Reported-by: syzbot+3e565959df8ce2f9b21b@syzkaller.appspotmail.com
First crash: 5d00h, last: 5d00h
Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KCSAN: data-race in __mark_inode_dirty / redirty_tail_locked (4) ext4 1 192d 190d 0/27 auto-obsoleted due to no activity on 2024/01/09 20:12
upstream KCSAN: data-race in __mark_inode_dirty / redirty_tail_locked (2) ext4 10 295d 429d 0/27 auto-obsoleted due to no activity on 2023/09/29 00:10
upstream KCSAN: data-race in __mark_inode_dirty / redirty_tail_locked (5) ext4 1 136d 136d 0/27 auto-obsoleted due to no activity on 2024/03/05 08:43
upstream KCSAN: data-race in __mark_inode_dirty / redirty_tail_locked (3) ext4 3 230d 255d 0/27 auto-obsoleted due to no activity on 2023/12/02 13:09
upstream KCSAN: data-race in __mark_inode_dirty / redirty_tail_locked (6) ext4 1 76d 76d 0/27 auto-obsoleted due to no activity on 2024/05/04 07:48
upstream KCSAN: data-race in __mark_inode_dirty / redirty_tail_locked ext4 1 498d 498d 0/27 auto-obsoleted due to no activity on 2023/03/31 02:53

Sample crash report:
==================================================================
BUG: KCSAN: data-race in __mark_inode_dirty / redirty_tail_locked

read-write to 0xffff888106af2f60 of 8 bytes by task 12930 on cpu 1:
 redirty_tail_locked+0x56/0x270 fs/fs-writeback.c:1346
 requeue_inode fs/fs-writeback.c:1609 [inline]
 writeback_sb_inodes+0x903/0xb20 fs/fs-writeback.c:1976
 __writeback_inodes_wb+0x9a/0x1a0 fs/fs-writeback.c:2018
 wb_writeback+0x270/0x720 fs/fs-writeback.c:2129
 wb_check_start_all fs/fs-writeback.c:2255 [inline]
 wb_do_writeback fs/fs-writeback.c:2281 [inline]
 wb_workfn+0x4ea/0x940 fs/fs-writeback.c:2314
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3312
 worker_thread+0x526/0x730 kernel/workqueue.c:3393
 kthread+0x1d1/0x210 kernel/kthread.c:389
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

read to 0xffff888106af2f60 of 8 bytes by task 2428 on cpu 0:
 __mark_inode_dirty+0x19f/0x7e0 fs/fs-writeback.c:2508
 mark_buffer_dirty+0x165/0x250 fs/buffer.c:1211
 __block_commit_write fs/buffer.c:2200 [inline]
 block_write_end+0x158/0x2e0 fs/buffer.c:2276
 ext4_da_do_write_end fs/ext4/inode.c:2952 [inline]
 ext4_da_write_end+0x1ad/0x860 fs/ext4/inode.c:3025
 generic_perform_write+0x276/0x410 mm/filemap.c:4026
 ext4_buffered_write_iter+0x1f6/0x380 fs/ext4/file.c:299
 ext4_file_write_iter+0x29f/0xe30
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0x78f/0x900 fs/read_write.c:590
 ksys_write+0xeb/0x1b0 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0x42/0x50 fs/read_write.c:652
 x64_sys_call+0x27ef/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f


Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/10 04:43 upstream 83a7eefedc9b 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-kcsan-gce KCSAN: data-race in __mark_inode_dirty / redirty_tail_locked
* Struck through repros no longer work on HEAD.